This is true, but the larger the margin the more difficult it makes it for them to contest.
Vote. Bring your friends and family to vote. Call up your friends in other states and make sure they have a voting plan.
Voting won't magically fix our broken political machine but it will help us from sliding deeper in the hole. Vote like you're taking a stupid little walk outside for your mental health during lockdown- not the only way you should be taking care of things but important maintenance nonetheless.
How many US presidential elections do you think there have been since 1984?